Tire

Abstract

A tire includes a pair of bead cores, a carcass layer extended across the bead cores, a belt layer disposed on an outer side of the carcass layer in a radial direction, and a tread portion. A tire outer diameter OD (mm) is in a range 200≤OD≤660. A total tire width SW (mm) is in a range 100≤SW≤400. A groove area ratio Aa of the tread portion is in a range 0.008≤Aa/OD≤0.150.

1 - 8 . (canceled) 
     
     
         9 . A tire, comprising:
 a pair of bead cores;   a carcass layer extended across the bead cores;   a belt layer disposed on an outer side of the carcass layer in a radial direction; and   a tread portion;   a tire outer diameter OD (mm) being in a range 200≤OD≤ 660,   a total tire width SW (mm) being in a range 100≤SW≤400, and   a groove area ratio Aa of the tread portion being in a range 0.008≤Aa/OD≤0.150.   
     
     
         10 . The tire according to  claim 9 , wherein a groove area ratio Ace of a center region of the tread portion and a groove area ratio Ash of a shoulder region of the tread portion have a relationship Ace/Ash<1. 
     
     
         11 . The tire according to  claim 9 , wherein a groove area ratio Ace of a center region of the tread portion and a groove area ratio Ash of a shoulder region of the tread portion have a relationship 0.2×(OD/300)≤Ace/Ash<1. 
     
     
         12 . The tire according to  claim 9 , wherein a maximum groove depth Gmax of the tread portion satisfies a relationship 0.006≤Gmax/OD≤0.083. 
     
     
         13 . The tire according to  claim 9 , wherein a maximum groove depth Gce (mm) of a center region of the tread portion and a maximum groove depth Gsh (mm) of a shoulder region of the tread portion have a relationship 1≤Gce/Gsh≤2.5. 
     
     
         14 . The tire according to  claim 9 , wherein a pitch number Pce in a center region of the tread portion and a pitch number Psh in a shoulder region of the tread portion have a relationship 0.4≤Pce/Psh≤1.2. 
     
     
         15 . The tire according to  claim 9 , wherein an average lateral groove width WLce and an average pitch number PCce within a tire ground contact length in a center region of the tread portion have a relationship 1500≤(WLce×PCce×OD)≤33000. 
     
     
         16 . The tire according to  claim 9 , wherein in a center region of the tread portion, an average pitch number PCce within a tire ground contact length over an entire circumference of the tire satisfies a relationship 0.005≤PCce/OD≤0.020. 
     
     
         17 . The tire according to  claim 10 , wherein a groove area ratio Ace of a center region of the tread portion and a groove area ratio Ash of a shoulder region of the tread portion have a relationship 0.2×(OD/300)≤Ace/Ash<1. 
     
     
         18 . The tire according to  claim 17 , wherein a maximum groove depth Gmax of the tread portion satisfies a relationship 0.006≤Gmax/OD≤0.083. 
     
     
         19 . The tire according to  claim 18 , wherein a maximum groove depth Gce (mm) of a center region of the tread portion and a maximum groove depth Gsh (mm) of a shoulder region of the tread portion have a relationship 1≤Gce/Gsh≤2.5. 
     
     
         20 . The tire according to  claim 19 , wherein a pitch number Pce in a center region of the tread portion and a pitch number Psh in a shoulder region of the tread portion have a relationship 0.4≤Pce/Psh≤1.2. 
     
     
         21 . The tire according to  claim 20 , wherein an average lateral groove width WLce and an average pitch number PCce within a tire ground contact length in a center region of the tread portion have a relationship 1500≤(WLce×PCce×OD)≤33000. 
     
     
         22 . The tire according to  claim 21 , wherein in a center region of the tread portion, an average pitch number PCce within a tire ground contact length over an entire circumference of the tire satisfies a relationship 0.005≤PCce/OD≤0.020.